/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize exports="amd" -o ./compat/`
 * Copyright 2012-2014 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
define(['../internals/baseCreateCallback', '../internals/baseIsEqual'], function(baseCreateCallback, baseIsEqual) {

  /**
   * Performs a deep comparison between two values to determine if they are
   * equivalent to each other. If a callback is provided it will be executed
   * to compare values. If the callback returns `undefined` comparisons will
   * be handled by the method instead. The callback is bound to `thisArg` and
   * invoked with two arguments; (a, b).
   *
   * @static
   * @memberOf _
   * @category Objects
   * @param {*} a The value to compare.
   * @param {*} b The other value to compare.
   * @param {Function} [callback] The function to customize comparing values.
   * @param {*} [thisArg] The `this` binding of `callback`.
   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
   * @example
   *
   * var object = { 'name': 'fred' };
   * var copy = { 'name': 'fred' };
   *
   * object == copy;
   * // => false
   *
   * _.isEqual(object, copy);
   * // => true
   *
   * var words = ['hello', 'goodbye'];
   * var otherWords = ['hi', 'goodbye'];
   *
   * _.isEqual(words, otherWords, function(a, b) {
   *   var reGreet = /^(?:hello|hi)$/i,
   *       aGreet = _.isString(a) && reGreet.test(a),
   *       bGreet = _.isString(b) && reGreet.test(b);
   *
   *   return (aGreet || bGreet) ? (aGreet == bGreet) : undefined;
   * });
   * // => true
   */
  function isEqual(a, b, callback, thisArg) {
    return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2));
  }

  return isEqual;
});
